Have a giant Archon, or Kell, have a bigger shrapnel gun with invisibility. At the beginning of the fight, one person is designated to pick up a relic called "Servitors Wisdom" or "Bane of the Kell" that allows them to see invisible ( like, completely invisible ) Fallen. I'll mention that again later. When the boss gets damaged enough it goes completely invisible, leading the relic holder to tell other players where he went, leading to taking down his mega super mlg elite arc shield, and damaging him again. The more damaged he is, the bigger shield he gets. All around him, stealth vandals and captains spawn. Tell me what you think about this idea ^.^